Improvement in steam-boiler furnaces



UNITED STATES PATENT OFFICE.A

F. P. DIMPFEL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN STEAlV-BOILER FU-RNACES.

Specication forming part of Letters Patent No. 10,364, dated January 3, 1854.

To all whom it may concern:

Be it known that l, F. P. DIMPFEL, of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in Which- Figure l is a longitudinal vertical section of my improved boiler; and Fig. 2 a cross vertical section through the front end of the boiler and furnace.

The same letters indicate like parts in both the ligures.

My invention consists in forming the walls or sides of the furnaces of steam boilers or generators of a series of vertical water-tubes when the grate-bars are so located that the head shall act on the upper portion of the tubes or conduits, said tubes being extended above and below the fire-grate and open above and below to water-spaces in order to produce an upward currentof the water,which will absorb the heatmore rapidly from the inner surface of the metal of the tubes, and hence preventthe overheating which usually occurs in furnaces with plain water sides. I surround a furnace, the walls orsides ot' which are composed of vertical water-tubes, with water-spaces between the tubes and the outer shell of the boiler, the said tubes opening at top and bottom in'to'said water-spaces to admit of the circulation of the water.

In the accompanying drawings, o. represents the furnace, b the main flue, and cthe'smokestack, of a boiler.

The drawings represent 'the furnace as square, although it may becircular or of any other desired form. The sides of the furnace are composed ot' a series of water-tubes d, which open into the water-spaces c and f. The water-space e at the top is connected with the water-space f at the bottom by the side water-space g between the side of the furnace and the outer shell of the boiler. The tubes are continued through the waterspace c and extended up above the crownsheet h of the {ire-box, thereby accelerating the circulation of water in the tubes. The top and bottom Water-spaces e and f must be connected, but notnecessarily, by the space g. There may be various means adopted by which they may be connected with the body of the water in the boiler in order to preserve the circulation without changing the character of my invention.

I do not claim lining the fire-box with water-tubes, nor do I claivin making the tubes of water-linings separately detachable; but

I do claim as my invention- Forming the walls or sides of the furnaces of steam-boilers of a series of water-tubes extending above and belowrthe grate and open to water-spaces above'and below, said spaces being so connected with each other or with the body of the water in the boiler as to allow free circulation, in the manner substantially as and for the purposes herein set forth.

F. P. DIMPFEL.

Vitnesses:

JOHN BARTON BREcKINinss`r WM. H. BISHOP. 

